Improvement in the manufacture of artificial stone



UNITED STATE JOHN E. PARK, OF RUTHERFORD COUNTY, TENNESSEE.

IMPROVEMENT IN THE MANUFACTURE OF ARTIFICIAL STONE.

Specification forming part of Letters Patent No. 127,264, (lated Mny 28, 1872.

SPECIFICATION.

shape or size, placed upon the yard to dry,

same as brick, and When thoroughly dried, hacked up the same as brick, having a series of flues from bottom to top at intervals of two and a half feet. The kiln is now ready to be fired. Commence with the bottom tiers or se; ries of fines 5 fire up slowly until the heat has obtained a cherry-red; hold it to this degree of heat four hours, being very careful not to let it reach a higher degree of heat, as if so, the mass becomes calcined and will slack down. The degree of heat aimed at is the development of incipient cementation. 'It may be known when incipient cementation is developed by the taste, not properly caustic, but slightly sweetish alkaline.

Olaim.

1. I claim the compounding and burning of cementitious elements in such a manner as to produce incipient cementation in the block molded, after the manner specified.

2. Also, the form and construction of kiln.

J. E. PARK.

Witnesses:

O. W. MoGnHEn, Tnos. G. MoGnnnn.

A'IENT QFFIGE. 

